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What kind of adjustable mattress?
My guess would be a 120v electric motor using a screw gearing.
Screw gearing can transfer torque very well in one direction, and you can use very small motors because they're usually a very high gear ratio (so they don't move quickly).
The uni-directional torque transfer is why screw gearing keeps the bed from collapsing, and why screw gear is extensively used in steering systems (especially for heavier vehicles, like trucks).
screw motor. Thanks. I googled an image of that and it all made sense. Pretty sweet. And based on that, the motor doesn't seem like it would have any impact on the minimum difference between height settings. It would just a question of some kind of control that converts the remote signal into a burst of on or off for the motor. So likely there are an infinite number of positions the bed could achieve because holding the the button would be nondeterministic as to how far it would move. Thanks.
Yep.
Don't even need a stepper or servo motor. Any old motor will do.
https://www.google.com/search?q=bed+lift+motor
You couldn't find info anywhere? I found a bunch of starting points with that one search...
ah see. you knew the magic word was lift. I was using things like "what kind of motor is used in mattress adjustable bases" And I was getting no where. The word lift didn't even occur to me. Thanks.
Looks like they're similar to linear actuators
I think so.
Don't linear actuators usually use a stepper or servo motor?
Yeah, but the gear box and ball screw are the same layout
lol. Before reading replies I thought you meant the thing that adjusts a sleep number bed.